Injector



P. 1. CREASEY.

INJECTOR. APPLICATION FILED JUNE 7, 1920.

1,383,985.. Patented July 5,1921.

2 SHEETS-SHEET I.

P. CREASEY.

INJECTOR.

APPLICATION FILED JUNE 7. I920- 1,383,985; Patented July 5,1921.

2 SHEETS-SHEET 2.

PERCY J. GREASEY, OF CABIN CREEK, WEST VIRGINIA.

INJECTOR.

Application filed. June 7,

T (all '10 7mm. it may concern: I

Be it known that I, PnRoY J. CREASEY, a citizen. of the United States of America, re siding at Cabin Creek, in the county of rianawha and State of West Virginia, have invented new and useful Improvements in Injectors, of which the following is a specification.

The object of the invention is to provide a simple and efficient construction of in j ector for use as a boiler feeding. mechanism and more especially to provide 'a double tube injector having self-priming or automati cally priming features to the end that whether used as a lifting or non-lifting injector, it may be primed by the admission of the steamwithout supplemental manipulation or re-adjustment; and furthermore to provide an injector mechanism which may be converted into and used as an apparatus of the single tube type; and with these objects in view, the invention consists in a construction and combination of parts, of which apreferred embodiment is shown in the accompanying drawing, wherein Figure 1, is a sectional view showing the parts arranged for use as a double tube injector.

Fig. 2, is. a similar view showing the parts, re-adjusted for use as a single tube injector.

Fig. 3, is an enlarged sectional view of the double valve and related parts, the members thereof being shown in full lines in the priming position and in dotted lines in the operative or injector position.

The apparatus embodies a cylindrical casing 10 with which communicates a steam supply pipe 11, the injection of steam to the casing being controlled by the valve 12 arranged to engage the transverse seat 13 and having connected therewith a stem 14. for actuation by the hand lever 15 or the equivalent thereof extending through a suitable stuflingbox '16.'

In communication with the steam valve seat is a chamber 17 which in turn is in com munication with thechamber 18 by means of an injector nozzle 19 removably fitted as by means of'threads 20 in a partition wall 21, and respectively in connection with the chambers 17 and 18 are the pressure tube 22 and the suction tube 28. The pressure tube and suction tube are provided with detachable sections 22 and 23 connected. with the body portionsrespectiveiy by couplings 2% Specification of Letters Patent.

Patented July 5, 1921.

1920. Serial No. 387,103.

and 25, said section'22 being extended into the section 23 and provided with a terminal suction nozzle 26 arranged to discharge axially into a suction thimble 27 which is removably seated in the tube section 23 and is adapted to be dismounted when the coupling member is removed to permit of the use of the suction tube 28 without cooperation with the pressure tube 22 as a single tube injector.

Fitted upon a seat 28 in the injector nozzle 1911s an injector valve 29 of which the stem 30 extending through the chamber 17 carries a piston head or disk 31 mounted in a cylindrical cavity 32 formed in the pressure valve 12 under such conditions as to permit of a limited un-seating movement of the pressure valve as indicated in Fig. 3

without unseating the injector valve 29.

The pressure valve at the outer end of the cylindrical cavity 32 is provided with a shoulder for contact with the piston head or disk 31., so that further movement of the pressure valve in direction from its seat will cause the unseating of the injector valve as shown in dotted lines in Fig. 8.

Separated from thechamber 18 of the casing by partition 3 1 is a chamber 35 into which extends a combining tube 36 carried by the said partition and arranged in axial alinement with the injector nozzle 19 so that steam impelled through the nozzle will pass through said combining tube causing a suc tion in the chamber 18 while disposed in axial alinement with the combining tube is a supplemental nozzle 37 of which the inlet end is in communication with the chamber so that steam passing through the combining tube into the supplemental nozzle will produce a'suction in the chamber 35.

In communication with the suction chambers 1'8 and35 respectively are the overflow ports 88 and 39 fitted with check valves 40 and 11 arranged in communication when said valves are unseated with the overflow outlets42 and 43. In the construction illustrated, said check valves are gravity seated and obviously are adapted to be drawn firmly into their seated positions by suction which may be created respectively in the chambers 18 and 35. The auxiliary or supplemental nozzle 37 discharges into the injector outlet 4: 1 which is adapted to be arranged in communication with the boiler feed.

In the operation of the mechanism, the

V first step is to operate thelever in a direction to the left as viewed in Fig. 1 to un- 1 seat the pressure valve 12until checked by the contact of the shoulder 33 with the piston head or disk 31 andthus to permit the passage of steam from the supply pipe 11 "through the valve seat13 to the chamber 17 and into the pressure tube 22. 'The steam tube 23 and into the chambers 18 and'35 7 causesthe unseating of the check valves 40 (and-4Z1 controlling the overflow ports Where it findsan outlet, and When the Watercar- 7 mod forward by the suction and-1n ect or ac tlon'ot the steam through the nozzle 26 reaches the outlet 48 and the chambers 18 and have been primed, the operating lever should bedrawn forward to the limit of its movement in the same direction as previo'uslypto cause the uns'eatingof the injector valve 29 whereupon the steam Will .pass directly from the chamberl'? through the injector nozzle. 19 and into the combin? ing tube to cause aisuction in the chamber 18 which will-immediately seatjthe valve 10. Also the steam. passing through thecombining: tube and into the auxiliary nozzle 37 will produce a suction in the chamber 35 Which Will seat the priming valve 41 andthe injector will then operate effectively to carry the water forward and through the discharge outlet 44-. a

eter adapting it to pass" through the open ing bounded by the shoulder 33 of the pres sure valve and the latter is provided with ga removablecapLscreW 17 .so that after the ln ector valve has beeninserted through the pressure valve and the piston h'ead or disk 31. arranged in the cylindrical cavity 32, the cap screw may-i be fitted in place to connect the pressure valve and injector valve under such conditions as to permit of-lost motion of the injector valve to provide for the successive 'unseating of said pressure and in jector'valves as hcreinbefore described in connection with the full operation of the injectorwmechani'sm. V

Also as will be obvious from the foregoing description the disconnection of the couplings and 25 Will permit ofth'e use of the suction tube independently of the pres sure tube forinj'ector purposes when a single tube construction is preferred without involving the necessity of a separate structure and from the manufacturers standpoint .VltlTOHtlilVOlVlng the add1t1'onal patterns or castings."

thereof.

anda suction chamber, an injector nozzle connecting the said chambers, pressure and suction tubes respectively in communication 7 with said chambers, the pressure tube being provided with a suction nozzlefdischarging axially into the suction tube,'-an'overfioW port in communication with the suction chamber and having an inwardly seating valve, a pressure "valve for controlling the communication of steam to the pressure chamber, and an injector valve seated in the injector nozzle to connect With the pressure valve for actuation thereby, the tormer belng capable of unseating movement independently of thelatter. 7

2., An injector having pressure, and Suetion tubesof which the former is provided with asuction nozzle discharging axially into the latter, an injector nozzle, -a' p ressure valve for admitting steam 'tothe pressure tube and the injector'nozzle and provided with a cylindrical-cavity, and an injector valve seated in the injector nozzle and'having its stem provided .-vvith a piston i head or diskmounted in said cavityofthepressure valve for movement. independently 3. injector-having pressurefand "sue; tion tubes ef'vvhijchthe former is; provided was a suction nozzle discharging axially into 7 the latter, an'injectorjnozzle, a'pressure va-lve for admitting steam "to the pressure'tube and lindrical ;cavity, and an injector valve seat ed n the in ector nozzle and havlng-itsstem insaid cavit of the ressure valveformovcmentindependently thereof, the pressure valve having asjhoulder for engagement w th;

tion tubes of hich'the' former is? provided I provided with a piston head or disk mounted a i The in ector valve 29 is made of a d1an1- Witlr a suction'nozzle discharginga kiall'y into the latter, an injector nozzle, apressure valve toradmitting steam tothe-pres- I isure tube and the injector "nozzle and'gprovided With acylindrical cavity, andan in} jector valve seated in'the injector nozzle: and

having its stem provided vvithga piston head or disk mounted in; said cavity 'of'the'" pressure valve" for movem nt, independently thereofthepressure valve havin'ga shoulder for engagement with said pis ton head or disk for imparting unseating movement to theinjector valve, and theinjectorvalve I being of a? diameter'less than that o'f thesaid shoulder. z '5 5. An injector having 'a'double valve con sisting of a steam' -pressure memberand an injector m'eindier said pressure memberbe in'g provided with "a cylindrical cavity fitted V 100V j the'injector nozzle and provided with a cy- 1 with a removable cap screw and provided with a contracted forward end forming a stop shoulder, and the latter having its stem provided wi h a piston head or disk fitted in said cavity the diameter of the injector memher being less than that of the contracted portion of the pressure member.

6. An injector having a compression chamher and a suction chamber, an injector nozzle connecting the said chambers, pressure and suction tubes respectively in communication with said chambers, the pressure tube eing provided with a suction nozzle discharging axially into the suction tube, an ove 'l'low port in communication with the suction chamber and provided with an inwardly seating valve, a pressure valve controlling the admission of steam to the pressure chamber an injector valve controlling communi cation between the pressure chamber and the suction chamber, and a common operating means for both the pressure and injector valves, tie pressure valve being unseatable by said means independently of the injector valve.

7. An injector having a pressure chamber and a plurality of suction chambers, an injector nozzle connecting the pressure chamber with one of said suction chambers, a combining tube connecting said first-named suction chamber with the other suction chamber, valved overflow ports in communication respectively with said suction chambers, a pressure valve controlling the admission of steam to the pressure chamber, an injector valve controlling the passage through the injector nozzle, and parallel pressure and suction tubes respectively in communication with said pressure chamber and the firstnamed suction chamber the pressure tube being in communication with the suction tube and provided with a suction nozzle arranged to direct a jet axially into the pressure tube, a suction thimble removably seated in the suction tube in axial alinement with said suction nozzle, and couplings detachably securing the pressure and suction tubes to the injector proper whereby the pressure tube and its associated elements may be removed to convert the injector into the single tube type.

In testimony whereof I aflix my signature.

PERCY J. OREASEY. 

